The <b>Vertu Signature mobile phone</b> is an irresistible choice when it comes to your love of technology and all things lavish. Used in the most important parts of Formula 1 engines, this design is 1/50th of the width of a human hair and ten times stronger than steel, meaning it is resilient and sure to change your life. You’ll especially fall for the 18-carat gold detailing and the face-cut sapphire keys with hidden characters that only appear when lit, not to mention the and matching black leather case for a luxurious addition.